Drill



(No Model.)

G. H. TYLER.

DRILL.

Patented Dec. 17, 1889.

To @ZZ whom it may concern):

-Mannville,

UNITED STATES PATENT OFFICE..

DRILL.

SPECIFICATION forming part of Letters Patent No. 417,610, dated December 17, 1889. Application iiled August 26, 1889. Serial No. 321,989. (No model.)

Be it known that I, GEoReE HENRY TYLER, a citizen of the United #taies` residing at in the county of Marathon and State of lVisconsin, have invented a new and useful Drill, of which the following is a' specification. Y

My invention relates to improvements in ratchet-drills, and has for its object the provision of a simple and easily-operated metalworking drill especially adapted for use in railroad-shops.

'lhe invention consists in certain novel features hereinafter described and claimed.

In the accompanying drawings, Figure l is a perspective view of my improved drill.. Fig. 2 is a longitudinal section of the same. Figs. 8 and l are detail views. Fig. 5 is a View of a modified form of securinghascpiece.

Referring to the drawings by letter, A designates the body of my improved drill, to one end of which I swivel the chuck. l, in which the drill-blade C is secured. '.lhis chuck is provided wi tha gear-wheel l), which meshes with a gear-wheel lf) en the drivingshaft F, projecting from one side ofthe body, and the said driving-shaft is provided at its outer end. with the reversely arranged ratchet-wheels G G, as shown. '.lhe operat ing-lever or crank-handle ll is bifurcated at its lower end, and the arms of the bifurcation are mounted on the driving-shaft XVithin the body of the operating-leverl provide the reversely.- arranged spring-actuated pawls l, which rest on and are adapted to engage the ratchet-wheels. By vibrating the operating-lever the pawls will be made to alten' nately engage theirrespeetive ratchet-wheels and the driving-shaft be thereby rotated.

O11 the body A of the drill, at a point diametrically opposite the driving-shaft, l provide a stud-shaft, on which I secure a gearwheel J, across the outer face of which I form a segmental groove K, the walls of which are dovetailed, as clearly shown. lVithin this groove I fit a block L, having a screw-threaded stem M projecting from its outer side through the groove K. This stem is engaged by a longitildinallyslotted lever N, which is fulcrumed on a post O, projecting from the body above the gear-wheel J,

and has apawl AP moluntcd on its upper end. A thumb-nut Q is mounted on the stem M of the block L and is adapted to be turned up thereon against the l'evcr N, so as to secure the said lever on the stem and also secure the block lirmly at the desired point of the groove. The stroke of this lever can thushe regulated. at will by shifting the block to different points of the groove. The post() is provided withahandle R, by mea-ns of which the device may be steadied while in operation, and the pawl l is pressed normally downward by a spring S, secured to the pivot of the pawl and bearing on the pawl. An annular flange or shoulder 'l is provided on a tubular socket Ri and has ratchet-teeth U on its upper side, and the said ratehet-teeth are engaged by the pawl l. .lhis socket ltI lis secured upon a spindle X2, which depends from a base-plate X, and is internally threaded. '.lhe said spindle is engaged by the externally-threadcd rod V, so that when the socket is r tated the threaded connection between the spindle and rod will cause the body to .have a longitudinal movement and thereby feed the drill forward, so as to hold it to its work.

lt will be seen that the rod Vis swiveled in the body, so that when it turns it will not turn the body. rlhe base-piece X is rigidlyiixed in place to any suitable support. Under certain circumstances I may employ the forni of basepiece shown in. Fig. 5, in which double prongs are used in place of the circularbearing-plate.

Frein the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided a very compactly arranged drill which will occupy very little room and which can be easily and rapidly operated.. rlhe device is placed. in. position in the usual manner, with the bascpiece X resting against the body of the opcrater or any suit-able fixed support, and the drill-blade placed against the rail or object to be bored. The handle R is then grasped, so as to steady the device, and the operatinglever is then vibrated, so as to operate the machine. As the lever is vibrated a rotary motion. will be imparted to the driving-shaft and the drill-blade, so that the drill. will be made to form the bore, as will be readily understood. '.lhe motion of the driving-shaft and the chuck 'ill be communicated directly to the gear-wheel J, and the lever N will conscqnentl y be vibrated, so as to cause the pawl and the ratchet shoulder or flange to feed the body of the drill forward step by step. The drill will thue` be fed to the work as the opening is formed therein, and the desired end quickly and easily accomplished.

The ratchet-wheels and the pawl are reversel y arranged, so that one of them is engaged on the forward stroke of the lever to rotate the driving-wheel, while the other wheel will be engaged on the reverse stroke of the lever to prevent retrograde movement of the machine. The motion of the driving-wheel is communicated directly to the gear-wheel D, so that the drill will be operated. The wheel .l will also be simultaneously rotated and the slide will act as a crank on the lever to vibrate the saine, the slotin the lever allowing the post to move freely without binding on the lever.

Having th ns described my invention, what I claim, and desire to secure by Letterel Patent, is-

i. The combination of the drillbody, `une ehnck swirelcd at one end of the body, the driving-shaft mounted on one side oi` the body, interlneshing gear-wheels on the chuck and the driving-shaft, the reverse]y-arranged ralcln311-heels4 al. the outer end ol the driv ing-shaft, the operating-lever having its lower end bifurcaied and the arms of the bifurca- 1ion mounted on the driving-shaft on oppo- `Qii'c Sides of the driving-wheels, and the reverselyarranged spring-pawls mounted in the body olf the operatingdever and engaging the ratchet-wheels, as set l'orth.

.Z.' The combination of the socket R", provided with the ratchet-teeth U, the base having the spindle X2, the rod V, having a threaded connection with the spindle, the lever fnlcrnmod on the side of the body, the pawl carried by said lever and engaging the ratchetteeth U, and the mechanism for vibrating said lever, as set forth.

3. The combination of the body, the gearwheel J, mounted thereon, mechanism for rotating said wheel, the ratchet-teeth U on the socket R", thelever fulerumed on the body an d adj ustabl y connected to the gear-wheel J, and the pawl carried by said lever and engaging the ratchet-teeth U, as Set forth.

4. The combination of a segmental groove, the lever N, provided with a longitudinal slot, the block; fitted in the segmental groove and having a stem passing through the slot of the lever, and the thumbnnt mounted on said stem and adapted to be turned up against the lever, as set forth.

5. la combinati on with the body A, carrying the swiveled,drill-chuck B, the operating mechanism for working the drill-chuck, the threaded rod V, swiveled in the body, the rigid basevpieee X, threaded on the rod V, the socket R, turn ing on the base-piece, the drivin g-shaft Ii, and intermediate pawl-and-ratehet meehanisin between the driving-shaft and the socket R4, for the purpose set forth.

(i. In combination with the body A, the swiveled drill-chuck, the driving-shaft F, the gearing on the same to drive the drill-chuck, the gear-wheel J on the driving-shaft, having the groove Ii, the lever fulcrumed to the body and adjustably secured in the groove, the pawl carried by the lever, the socket R, provided wit-h ratchet U, and the base-piece provided with the spindle X2 as set forth.

In testimony that I claim the foregoing as my own I have hereto af xed my signature in presence of two witnesses.

GEORGE HENRY TYLER.

NVitnesses:

1I. A. FNEY, WM. GARvEY.

the Wheel J, having l 

